Mining apparatus



Sept. 26, 1933. c. F. OSGOOD MINING APPARATUS Original Filed Nov. 6, 1931 4 Sheets-Sheet 1 Sept. 26, 1933. c. F. 056000 1,927,949

MINING APPARATUS Original Filed Nov. 6, 19:51 4 Sheets-Sheet 2 wfi a w a N 2% E m w my a m x .mmN M v Q wx 1W 4W Q 6 a N 6 w N MA M Nwwmq M Q .QN/ QQQ N .1, I, w? V av vuwffi 44v: 044 I 4 400%. in N @N o a 0 Z o o a o o @MQNQ w QR 8% Q Q NN Q N QR hm i W a H [Q W2 MW f Q q 3 m Q N a fi I Q Q a E x Q 2 Q wig Q m 5 .Q Q w 5% Sept. 26, 1933. c; F, OSGOOD MINING APPARATUS 4 Sheets-Sheet 3 Original Filed Nov. 6,. 1931 wmN NNN 4.; A Mm.

Patented Sept. 26, 1933 UNITED STATES,

1,927,949 MINING APPARATUS Charles F. Osgood, Claremont; N. IL, assignor "to Sullivan Machinery Company, a corporation of Massachusetts Application November 6, 1931, Serial No. 573,437 Renewed October 28, 19 32 44 Claims.

This invention relates to mining apparatus and more particularly to improvements in coal mining apparatus of the combined horizontal and shear cutting, wheel mounted, track supported and guided type.

An object of this invention is to provide an im-' proved coal mining apparatus. Another object is to provide an improved coal mining apparatus of the wheel mounted, track supported and guided type adapted to operate while supported and guided by a mine trackway. Another object is to provide an improved coal mining apparatus of the combined horizontal and shear cutter type having improved adjustable kerf cutting mecha nism. A further object is to provide in a mining apparatus of the aforesaid character improved adjustable kerf cutting mechanism operative to out k'erfs either horizontally or vertically. another object is to provide an improved combined horizontal and shear cutting type, mounted track cutter adapted to operate while supported and guided by a mine trackway and having improved adjustable kerf cutting mechanism whereby the kerf cutter may be positioned at the level of the mine floor outside and below the level of the mine trackway to cut a horizontal kerf at the level of the mine floor. Yet another object is to provide an improved adjustable kerf cutting mechanism whereby the kerf cutter may be posi tioned at the level of the mine floor outside and below the level of the mine trackway to cut a horizontal kerf at the level of the mine floor or may be positioned to cut a vertical kerf. Still another object of this invention is to provide in an apparatus of the aforesaid character an improved adjustable turntable mounting for the cutting mechanism, improved mechanism for adjusting the cutting mechanism relative to the turntable and improved driving means for the kerf cutterand the kerf cutter adjusting mechanism. Yet another object is to provide a mining apparatus of the above character provided with turntable tilting means whereby the turntable may be tilted relative to thehorizontal to change the angle in altitude of the kerf cutter. Another object is to provide an improved mining apparatus having an improved general arrangement and combination of parts. ,These and other objects of this invention will, however, hereinafter more fully appear.

In the accompanying drawings there is shown for purposes of illustr'ation'one form which the invention may assume in practice.

In these drawings:

Fig. l is a top plan view of the illustrative em- Still bodiment of the improved mining apparatus, parts being shown in section toillustrate structural details; Y

Fig. -2 is a side elevational view of the 'appara tus shown in Fig. l; 1 I

Fig; 3 is an enlarged central longitudinally extending vertical sectional View taken substantial- 1y on line 3 3 ofFig. 1; 3 p v Fig. 4 is a oentral'longitudinally extending vertical sectional view taken substantially on line 4-4 of Fig. 1, with parts shown in elevation;

Fig. 5 is a horizontal sectional view taken substantially-on line -5-5of Fig. 4;

Fig. 6 is a transverse'vertical sectional view taken substantially on line-66 of Fig. 3; V

' Fig. '7 is a detail vertical sectional view taken substantially on line. 7-7 of Fig. 2; -1

Fig. 8 is a detail sectional view taken substantially on line 8-8 of'Fig. 7. I

In'this illustrative construction there isshown a coal mining apparatus of the wheel mounted,

erate While supported and guided by a mine trackway and generally comprising a self-.propelledtruck l mounted on Wheels 2 adapted to run alonga trackway 3 laid-on the mine floor.- Mounted on the truck 1 is a substantially horizontal turntable 4 rotatable relative to said truck about a substantially vertical, axis and carrying vertical guide frames, 5 in turn having adjustably mounted thereon, a-support 6. Rotatably mounted on the forward end of the support fi and overhanging the turntable 4 is a rotatable cutter carrying head 7 having mounted thereon for adjustment toward and fromthe head axis track supported and guided type adapted to op-' and for swinging movement relative to the cutterhead, a kerf cutter 8. Mounted on the truck a the mine trackway both during cutting and transport. a p

The truck 1 comprises a circular casting 1O on which the turntable 4 is rotatably mounted, and a rearwardly extending truck frame portion 11 supporting the motor 9. Thisfmotor is hereinpreferablyof the reversible electric type and is herein arranged with itspo'wer shaft 12 hori- I zontally disposed and extending longitudinally of the truck. The mechanism for rotating the turntable 4 relative to the truck and for driving the truck wheels to propel the apparatus comprises a worm 13 fixed to the motor power shaft 12 and meshing with a worm wheel 14. This worm wheel is keyed to a hollow shaft 15 journaled on a horizontal shaft 16 herein arranged transversely of and suitably journaled on the truck frame. This shaft 15 is adapted to drive through a plural speed, frictionally controlled, planetary transmission mechanism generally designated '17; a hollow shaft 18 likewise rotatably mounted on the shaft 16. This planetary transmission mechanism generally comprises a rotat able casing 19 frictionally controlled by a brake band 20 regulated by a hand wheel 21. A sliding clutch element 22 controlled by a clutch member 23 is employed for attaining a relatively high and a relatively low speed, this clutch member being alternatively engageable with the high and low speed members of the transmission mechanism. As the specific structure of this planetary transmission mechanism is well known to thoseskilled in the art, further illustration and description'thereof are unnecessary- Keyed to and driven by the shaft 18 is a bevel gear 24 meshingwitha bevel gear 25 suitably journaled within a bearing bracket 26. The bevel gear 25 meshes with a reverse bevel 27 journaled on the shaft 15. The bevel gears 24 and 27 ro- I of opposite directions.

the shaft 16 may be driven at either a high or tate in opposite directions and are selectively connectible to the shaft 16 by, a sliding clutch 28 to effect rotation of the shaft 16 in either It will thus be seen that a low speed under frictional control at either speed and in either direction at either speed. The truck wheels may be-driven from the shaft 16 through a sprocket 29 connectible to the shaft by a sliding clutch 30 This sprocket 29 is connected by an endless chain 31 toa sprocket 32 fixed to the rear truck wheel axle. The front and rear truck wheel axles are connected in driving relation by a usual chain and sprocket connection-33. It will thus be evident that the truck wheels may be driven at either of opposite directions at either a low or a high speed without reversal of the motor. Secured to the hub of 1 the sprocket 29 is a brake drum 34 with which ing with a bevel gear 40 keyed to a hollow shaft 41. The shaft 41 extends longitudinally of the truck and is suitably journaled on the truck frame. Keyed to and driven bythe shaft 41. is a bevel gear 42 meshing with the teeth of a large bevel gear 43 formed on the bottom of the turntable 4 as shown in Fig. 3. It will thus be seen that the turntable 4 may be rotated in either of opposite directions at either a low or a high speed without reversal of the motor 9. The turntable 4 may be locked in its different positions of adjustment about its axis by means of asliding lock member 44 guided within a frame 45 and engageable with notches 46 formed about the periphery of the turntable. When the lock 44 is released and the clutch 30 is disconnected, the turntable 4 may freely turn about its axis.

The mechanism for bodily adjusting the support 6 vertically along the guide frames 5 relative to the turntable 4 to vary the elevation of the cutting mechanism herein comprises a chain sprocket 47 fixed to the motor shaft 12 and connected by an endless chain 48 to a sprocket 49 keyed to a transmission shaft 50 herein extending centrally through the hollow shaft 41, as shown in Fig. 3, and likewise suitably journaled on the truck frame. Keyed to the forward end of this shaft is a bevel pinion 51 meshing with 'a bevel gear 52 keyed to an upright hollow drive shaft 53. The shaft 53 is arranged with its axis coincident with the turntable axis and is suitably journaled within a hub 54 formed on' the turntable casting and a bearing 55 carried by a gear housing 56 secured to the circular turntable casting 10. Telescopically arranged within the shaft 53 and splined to the'shaft is a shaft 57.

suitably journaled within bearing sleeves 58 with in the adjustable support 6. The shaft 57 is secured at its upper end as by a transverse pin 59 to the hub of a spur gear 60. As illustrated, the gear60 'meshes'with a gear 61 in turn meshing with a gear 62 journaled on and movable axially relative to a vertical shaft 63. The gear 62 is movable axially on the shaft 63 by means of a clutch collar 64 and has a downwardly extending cone 65 adapted to be clutched with a worm 66 to the sides of the supportfi, as shown in Fig. 1. Fixed to the shafts '71 are spur pinions 79 mesh-.

ing with the teeth of vertical racks 80 formed on the guide frames 5. guide frames 5 are mounted on the turntable 4. The arrangement is such that when the gear 66 is meshing with gear 61, the cone 65 engages the worm 66 to drive the shafts 68, 71, the driving connections between. the bevel gear 52 and the gear 60 being constantly maintained as the support 6 is adjusted along the guide frames by the splined shaft 57 telescopically arranged within the drive shaft 53. The motor 9 may be reversed As previously mentioned, the

to raise and lower the support 6 as desired. The

worm gearing 66, 6'7 is of a self-locking type so that the support 6 is automatically maintained in any desired position when the friction clutch 65 is released.

Now referring to the cutting mechanism, it will be noted that the cutter head 7 is provided with a neck frame 85 having secured theretoa cylindrical bearing member 86 rotatably mounted within a circular bearing frame 87 secured to the forward end of the adjustable support .6.

Extending axially through theneck is a shaft 88' driven by a bevel gear 89 meshing with a bevel' gear 90 keyed to and driven by the splined shaft 57. The bevel gear 90 is suitably journaled within the support 6 while the shaft 88 is journaled in bearings carried within the support 6 and the rotatable neck frame 85. is a spur pinion 91 meshing with a spur gear 92 keyed to a longitudinally extending shaft 93 suitably journaled within the support 6. Fixed 7 t9 and. driven by the shaft 93 is a bevel pinion 94 Keyed to the shaft 88.

meshing with reverse bevels and 96 loosely journaled on a .vertical shaft 97, likewise suitably journaled within the support 6. These reverse bevels are selectively connectible with the shaft 97 by multiple disc'clutehes 98 and 99, respectively, these clutches having suitable operating means including a shipper -member 100 operated through a rack and pinion 1-31 by .a control handle 102 carried at the rear end of the support 6.. Keyed to the shaft 97 is a worm 163 meshing with a Wcrm wheel 194 fixed to a longitudinally extending shaft 105 herein arranged parallel with and above the shaft 83 as shown in Fig. '3. The shaft 105 is journaled within a bracket 106 attached to the. support 6 and has keyed thereto a spur pinion 107 meshingwith'the teeth of an internal gear 108, herein formed in-. tegral with the cylindrical bearing member 86. It will thus be seen that depending upon which of the friction clutches 98, 99 is applied the cutter' head may be rotated about the axis cf the neck shaft 88 by power in either of opposite directions without reversal of the motor. The worm gearing 103, 104 is of a self-locking type and when the clutches 98, 99 are released, maintains automatically the cutter head in its adjusted position.

Now referring to the mechanism for driving the. cutting mechanism, it will be observed that fixed to the forward end of the shaft 88 is a bevel pinion 110 meshing with a large bevel gear 111 suitably journaled and housed within the cutter head frame. This bevel gear is connectible with a shaft112 having connectible thereto by a sliding jaw clutch 113, a chain sprocket 114 which engages and drives an endless cutter chain 115 mounted for orbital movement about the margin of a cutter bar 116, the cutter bar and chain constituting the kerf cutter 8. It will thus be seen that the cutter chain may be connected in driving relation with the motor 9 or when the clutch 113 is released, may remain idle at will during running of the motor.

The kerf cutter 8 is mounted on the cutter head for adjustment toward and from the axial line of the neck, and. this adjusting mechanism comprises parallel guideways 117, 117 supported by the neck frame 85 and extending perpendicularly to the neck axis. Slidably mounted on these guide'ways are guides 118, 118 secured to members 119 fastened to a cutter supporting frame 120. It will be observed that the frame 120 has secured thereto an annulus'121 which, together with an annular shoulder 122, provides an annular guideway fora rotatable frame member 123. Secured to this frame member 123 is a frame 124 which carries the cutter bar 116. As illustrated, the bevel gear 111 is connected in non-rotative relation to a sleeve-like nut element 125 and arranged coaxial with this nut herein is a splined sleeve 126 which is keyed to a sleeve member 127. This sleeve member is selectively connectible by a sliding clutch 128 to a relatively stationary member 129 secured to the cutter head frame or to the nut member 125. Suitable clutch operating mechanism is provided including a pivoted shipper yoke 130 fixed to a shaft 131 having an operating lever 132. Threadedly engaging the nut 125 are threads 133 formed on the drive shaft 112 for the cutter chain 115. This shaft has splineways 134 thereon cooperating with splines 135 upon the sleeve member 126. The screw shaft 112 has a collar 136 thereon engaging a suitable combined bearing and support ing means 137' for'the frame '120 and the mech anism supported thereby so'that the screw shaft 112 is adapted to effect. adjustment-ofthe cutter bar supporting frame 120 along the guideways 117 toward and from the neck axis. It will thus be seen that/when the clutch '128 is moved into a position to connect the sleeve '126to the .relatively stationary member 129, the screw shaft 112,

due to its splined'connection with thesleeve 1.26, is held against rotation and that upon rotation of the nut member 125, the screw shaft is mo'ved axially to effect adjustment of the cutter bar toward and from the neck axis depending upon the direction of motor rotation. It will also be noted that when the clutch 128 is shifted into its o ppositeposition connecting the sleeve 126 to the, nut 1 spur gear 139 (see Fig.4) secured for rotation with the shaft 112 and, meshing, asshown in Fig. 5, with spur gears 140 and 141. Rotatable with the spur gear 140 is a worm 142 meshing with a slow speed worm wheel 143. This worm wheel is connectible by a usual multiple disc clutch 144to a transverse shaft 145, the latter having fixed thereto, a worm 146 meshing with a worm wheel 149. This worm wheel is suitably journaled within the frame 120 and is'fixed to a shaft 159, the latter in turn having fixed thereto and driven thereby, a spur pinion 151 meshing with the teeth of an internal gear 152 formed on the cutter bar supporting member 123. Rotatable with the spur gear 141is a worm 153 meshing with a fast speed'worm wheel154 having its teeth inclined oppositely from the teeth of the worm wheel 143 and operative upon application of a multiple disc clutch 155 to effect drive of the shaft at a fast speed in a direction opposite from the slow speed drive described above. It will thus be seen that upon ap-" plication of one or the other of the clutches 144,

155, the cutter bar maybe swung about a pivotalaxis coincident with the axis of. the screw shaft 112 at a relatively high bar positioning speed in one direction or arelatively low speed appropriate for.

cutting in the opposite direction. The worm gearing is of the self-locking type and therefore when vided a pair of oppositely disposedlongitudi'nally 1 extending bearings 162, 162 in which are mounted aiined shafts 163, 163. wardlybeyond their respective bearings and are journaled in trunnions 164 and 165 extending These shafts project'outdownwardly from the turntable casting. .By.

means of the trunnion support just described, it will be seen that the entire apparatus maybe tilted about a longitudinal axis relative to the rear axle 169. Adjustment of "this tilting move.-.

ment is provided by suitable mechanism such as shown in Figs. 3, 7 and 8; Integral with the bolster 161 is a projecting arm 1'66, herein extending forwardlyand having at its forwardend and bearing in a pair of yokes 174, 1'74 formed integral with a plate 1'75 secured to the turntable castingj A retaining nut 176 is threaded on the lower end of the pin 171 to retain the screw there-' on. Suitable means is provided for rotating the screw respective to the nut and may comprise a plurality of laterally extending projections integral with the screw and having sockets 1'77 for thereception of -a suitable turning instrument. From the above description of the adjusting mechanism, it will be seen. that the turntable casting, together with the turntable and the other elements supported thereby, may be tilted relative to the rear axle by screwing the screw 170- up or down in the nut 169, the pivotal connections of the co-acting'threaded members with their respective elements affording compensation for the slight variations in the normal parallel relationship of the turntable casting and the axle bolster. 1

The front axle 1'79 is also mounted in a bolster 180, as shown in Figs. 3 and 6. This bolster extends between the supporting wheels and is pro? Vided with a trunnion connection in alinement with the trunnion connection of the rear axle 160 so asto permit the turntable casting to tilt on a common longitudinal axis when the longitudinal tilting adjustment is manipulated. This trunnion. mechanism on the front axle comprises of pins 181, 181 extending between supporting members 182, 182 integral with the front bolster and having a member 183'spanning the axle and provided with arms 184, 184 bearing on said pins. The forward axle is also provided with means for tilting the turntable casting on a transverse axis which in the present construction comprises a threaded screw member 185 carried by the member 183 and extending upwardly therefrom into threaded engagement with a nut 188 rotatably mounted in a depending boss 18'? formed integral with the turntable casting. The nut 188 is provided with means for rotating the same which comprisesa plurality of projecting arms integral with the nut and having sockets 188 for the reception of a suitable turning instrument in a similar manner to that already described in connection with the longitudinal ad justing mechanism. It will be observed that the raising or lowering of the turntable casting relative to the front axle causes the entire apparatus to be tilted about a transverse axis with the rear axle and supporting wheels forming the fulcrum.

The adjusting devices relative to the two axles provide a simple and efficient means for tilting the turntable together with the cutting mechanism either on a transverse 01' a longitudinal axis, all of the mechanisms being compactly located beneath the turntable casting so as to require a minimum overall height of the apparatus. The front axle is free to rock on a longitudinal axis respective to'the rear axle thereby affording relative flexibility of the axles when traveling over an uneven trackway.

The preferred'mode of operation of the improved mining apparatus will now be described. Theapparatus is propelled forwardly along the mine trackway at a' relatively high transport speed under the controlof the variable speed mechanism 17 driven by the motor 9.. Whenthe apparatus is traveling about the mine the turnthe motor 9 by releasing the brake band 20 and disconnecting clutches 22 and 30. If it is desired to make a swinging cutfat or near the level of the mine floor in front of the end 'of the trackway, the operator first applies thefriction clutch 155 controlling the fast speed bar swinging mechanism and the cutter bar 116 is swung about-its pivot relative to the cutter head at a relatively fast bar positioning speed from the position shown in Fig. 1 laterally to a position with the tip end of the bar adjacent the right hand rib of the'entry,.the friction clutch thereafter being released. The operator then shifts the clutch 128 to a position to connect the sleeve 126 to the relatively stationary member 129 and upon running of the motor 9 in the proper directi0n,'the cutter bar may be moved rectilinearly along the guideways 117 downwardly away from the head axis until it occupies a position at or near the level of the mine floor, the adjustingmechanism being driven from the motor 9 through the neck shaft 88 and bevel gearing 110, 111. 128 is then shifted downwardly to disconnect the sleeve 126 from the relatively stationary member 129 and to connect the sleeve to the bevel gear 111, and the clutch 113 moved to a position to connect the cutter chain driving sprocket -114 to the shaft 112, and asa result the cutter chain 115 is rapidly circulated about the margin of the cutter bar 116, the screw shaft 112 then'acting only as a transmission shaft with no axial adjustment. The friction clutch 144 controlling the slow speed bar swinging mechanism is then applied and the cutter bar is swung transversely in its plane across the front end of the trackway to make an arcuate out beneath the coal. When the tipv end of the cutter bar reaches a position adjacent the left hand rib, the friction clutch 144 is released. After the completion of the swinging cut, the cutter chain 115 is disconnected from its drive, the clutch 128 shifted to connect the sleeve 126 to the relatively stationary member 129, and upon reversal of the motor 9, the cutter bar is moved upwardly rectilinearly along the guideways 117 toward the head axis to the position shown in Fig. 2, the clutch 128 thereafter being moved to its neutral position. The clutch is then shifted toiconnect the sprocket 29to the shaft 18 and the reverse clutch 28 shifted and as a result the apparatus is propelled rearwarclly along the mine trackway at a high transport speed under the control of the variable speed transmission mechanism 17. r

If it is desired to cut a horizontal kerf at or near the level of the mine floor outside and below the level of the mine trackway, the operator releases the turntable lock 44 and shifts the clutch 30 to connect the sprocket 36 to the shaft 16, and asa result the turntable 4, together with the cutting mech'anisrn supported thereby, is swung laterally from'the position shown in Fig.1 to a position wherein the bar pivot is located outside the mine trackway, the turntable being swung by power from the motor 9 underthe control of the variable speed transmission mechanism 1'7 and the reverse clutch 28. During horizontal swinging movement, of the turntable relative to The clutch the truck, the cutter bar may be swung simultaneously about its pivot in the opposite direction relative to the cutter head under thecontrol of the slow speed bar swing clutch 144 until the parts assume an angularly related position in a well known manner. When the parts are thus disposed with the bar pivot lying outside the mine trackway, the operator releases the brake 20, reverse clutch 28 and the bar swing clutch 144 and then locks the turntable 4 against angular movement by sliding the locking member 44 into one of the notches 46 on the turntable. The clutch 128 is then shifted to connect the sleeve 126 to the relatively stationary member 129 and upon actuation of the driving gearing 110, 111, the cutter bar is moved rectilinearly downwardly along the guideways 117 away from the head axis until it occupies a position at or near the levelof the mine floor. The clutch 128 is then moved toconnect the sleeve 126 and the nut 125 together and the clutch 113 connected thereby to efifect circulation of the cutter chain about the margin of the cutter bar. The apparatus is then propelled forwardly along the mine trackway at a relatively slow cutting speed under the control of the variable speed transmission mechanism 1'1, sumping the cutter bar beneath the coal. After the completion of the sumping cut, the truck wheel drive is released and the brake 35 set. The operator then releases the locking member 44 for the turntable and upon connection of the turntable swinging mechanism with its drive, the turntable, together with the cutting mechanism supported thereby, is swung horizontally at a low cutting speed to effect horizontal swinging movement of the cutter bar in its'plane. During the initial swinging movement of the turntable, the cutter bar is swung about'its pivot in a reverse direction under the control of the friction clutch 155 until the parts assume a straight line position wherein the cutter barextends parallel to a line including the bar pivot and the turntable axis. After the tip end of the cutter bar has reached the left hand rib and the swinging out has been completed, the cutter bar is again swung about its pivot in a direction opposite to the direction of the turntable rotation while rotation of the turntable is continued until the parts assume an angularly related position. The turntable 4 is then looked against rotation and the brake 35 released and the apparatus propelled bodily rearwardly along the mine trackway at a slow cutting speed under the control of the variable speed transmission mechanism 17 and the reverse clutch 28, thereby withdrawing the cutter bar from beneath the coal, the parts are again returned to their transport position as shown in Fig. 2. l 1

'A horizontal kerf may be cut at or near the level ofthe mine roof by connecting the elevating mechanism to the motor 9 by application of the.

friction clutch'55 thereby connecting the elevating pinions '79 to the motor and moving the cutter support 6 rectilinearly along the vertical rack-s 80. The cutter head 7 is then rotated about its axis under the control of one or the other of reverse frictions 98, 99' of the head rotating mechanism to a posi ion wherein the cutter bar is located at the top of the cutter head. The cutter bar is then adjusted vertically rectilinearly along the guideways 17 upwardly away from the head axis until the same occupies a position ad jacentthe mine roof. The cutter bar is then sumped in,, swung transversely in its plane and withdrawn from the coal in the manner described.

above in connection with the horizontal bottom out. It will herein be noted that during any of the horizontal cutting-operations described above, the turntable 4 may be tilted to vary the angle in altitude of the cutter bar, for instance, to accommodate: the. cutter bar to the variation in pitch'in coal seams or to cut on av rolling bottom, simply by adjusting" the tilting screws adjustment of the elevating screws, the turntable may be 'lted into difierent angular positions about transverse and longitudinal axes as desired thereby enabling the cutter bar to be positioned to suit different cutting conditions.

A shear or vertical cut may be inserted in the' coal .iaee simply by applying one orthe other or reverse frictions 98, 99 of the head rotating mechanism thereby to eiiect rotation of the cutter head about the head axis tobringthe cutter bar into a position to swing vertically in its" During the shearing operation, the cutplane. terbar is first sumped in and then swung downwardly in itsplane and thereafter withdrawn from the coal in a manner similar to that de scribed above in regard to horizontal cutting.

It will be noted that the cutter bar rnay not 1 only be adjusted vertically-into different elevated i a positions relative to the turntable'but that the same may be moved bodily toward and from the head axis into difierent parallel planes in any of its positions about'the'neck axis,thereby enabling the apparatus to cut parallel horizontal kerfs and parallelvertical kerfs and by adjustment'of the cutter head about the head axis, cut kerfs in a plurality of intersecting planes. I

As a result of this invention it will be. noted that an improved coal mining apparatus of the combined horizontal and shear cutting type is provided which is adapted to cut horizontal kerfs" at or near the level of the mine fioor'outside and below the level of the trackway, and also to cut shear or vertical kerfsg It will further be notedthat the kerf cutter may be adjusted'to cut kerfs at or near the level of the mine roof,

and keris inparallelplanes either vertically 'or' horizontally. It will still further benoted that by providing the improved adjustable supporting means for the cutting mechanism and by the provision of the common motor for the various mechanisms of the machine, the-cutter bar may 7 positioned in an improved manner while at the same time the driving connections are greatly simplifiedand improved, it being pos-' sible to operate the apparatuses a mounted bottom cutter, top cutter; shear cutter and slabb'ing machine, thereby enabling the apparatus to'ac commodate itself to practically every mini'ngcondition encountered wherever the use' of mounted track cutter is possible. These and other uses and advantages of the improved mine 1 ing apparatus will be clearly apparent to'those skilled in the art.

While there is in this application specifically described one form which the invention may assume. in practice, it will be understood that this form of the same is shown for purposes of illus tration and that the invention may be modified and embodied in various other forms without V and mechanism driven by said motor for rotat fee departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is: o

1. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a verticalvaxis, a support mounted on said turntable for adjustment into difierent elevated positions relative thereto, a kerf cutter carrying cutter head mounted on said support for rotation relative thereto about a horizontal axis,a,motor mounted on said base independently of said turntable and said support, mechanism driven by said motor for actuating said kerf cutter, and mechanism driven by said motor for rotating said cutter head about its axis.

'2. Ina mining apparatus, a portable base, a

horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a support mounted on said turntable for adjustmentpinto different elevated positions relative thereto, a kerf cutter carrying cutter head mounted on said support for rotation relative thereto about a horizontal axis, a motor mounted on said base independently of said turntable and said support, mechanism driven by said motor for actuating said kerf cutter, mechanism driven by said motor ior rotating said cutter head about its axis, and mechanism driven by said motor for adjusting said support relative to said turntable.

3. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a support mounted on said turntableior adjustment into different elevated positions relative thereto, a kerf cutter carrying cutter head mounted on said support for rotation relative thereto about a horizontal axis, a, motor mounted on said base independently of said turntable and said support, mechanism driven by said motor for actuating said kerf cutter, mechanism driven by said motor for rotating said cutter head about its axis, mechanism driven by said motor for adjusting said support relative to said turntable,

ing said turntable.

4. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a supportmounted on saidturntable for adjustment into different elevated positions relative thereto, a kerf cutter carrying cutter head mountedon said support forrotation relative thereto about a horizontal axis, a motor mounted on said base independently of said turntable and said support, mechanism driven by said motor for actuating said kerf cutter, mechanism driven by said motor for rotating said cutter head about its axis, mechanism driven by said motor for adjusting said support relative to said turntable, mechanism driven by said motor for rotating said turntable, and mechanism driven by said motor for propelling the apparatus.

5; In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, upstanding guideways mounted on said turntablaa support mounted on said turntable for adjustment along said guideways into different elevated positions relative to the turntable, a cutter bead mounted on said support for rotation relative thereto about a horizontal axis, a keri cutter pivotally mounted on said cutter head, a motor mounted on said base independently of said turntable andsaid support, and mechanisms driven by said, motor for actuating said kerf cutter, for rotating said cutter head, for adjusting said support, for rotating said turntable and for propelling,

the apparatus. I

6. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a motor mounted on said base independently of said turntable, a cutterhead mounted on said turntable to rotate relative thereto about a hori! zontal, axis and for adjustment vertically relative to said base, a kerf cutter pivotally mounted on said cutter head, mechanism driven byv said motor for actuating said kerf cutter, and mechanism driven by said motor for rotating said turntable.

7. In a mining apparatus, a portable base, a 7

on said cutter head, mechanism driven by said motor for etuating said kerf cutter, mechanism 7 driven by said motor for rotating said turntable,

a motor mounted on said base independentlyof said turntable, a cutter head mounted on said turntable toj'rotate relative thereto about a horizontal axis and foradjustment vertically relative to said base, a keri cutter pivotally mounted on said cutter head, mechanism driven by said motor for actuating said keri cutter',-mechanism driven by said motor for rotating said turntable, mechanism driven by said motor for rotating said cutter head, and mechanism driven by said motor for adjusting said cutter head.

9. In amining apparatus, a-portable base,'a

horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a

motor mounted on said base independently of said turntable and relativeto which said turntable is rotatable, a support mounted on said turntable for adjustment into difierent elevated positions relative thereto, a cutter head mounted on said support for rotation relative thereto about a horizontal axis, a kerfcutter pivotally mounted on said cutter head, mechanism driven by said motor for actuating said kerf cutter, and mechanism driven by said motor for rotating said turn table. i

10. In a mining apparatus, a portable base, a

horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a motor mounted on said base independentlyof said turntable and relative to which said turntable is rotatable, a support mounted on said turntable for adjustment into different elevated positions relative thereto,'a cutter head mounted on said support for rotation relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutter head, mechanism driven by said motor for actuatin said kerf cutter mechanism driven by said motor for rotating said turntable, and mechanism driven by said motor for rotating said cutter head. I

11. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a motor mounted on said base independently of said turntable and relative to which said turntable is rotatable, a support mounted on said turntable for adjustment into difierent elevated positions relative thereto, a cutter head mounted on said support for rotation relative thereto about a horizontal axis, a kerf cutter pivotaily mount- ,ed on said cutter head, mechanism driven by said on said support for rotation relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutter head, mechanism driven by said motor for actuating said keri cutter, mechanism driven by said motorior rotating said turntable, mechanism driven by said 'motor for rotating said cutter head, mechanism driven by said motor for adjusting said support relative to said turntable, and'mechanism driven by said motor for propelling the-apparatus.

13. In a mining apparatus, a portable base, a

;horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a support mounted on said turntable for adjustment into different elevated positions relative thereto, a cutter head mounted on the forward end of said support and overhanging said turntable, a kerf cutter mounted on said cutter head for adjustment into different elevated positions relative thereto, a motor mounted on said base independently of said turntable and said support, mechanism driven by said motor for actuat- I ing said kerf cutter, and mechanism driven by said motor for adjusting said kerf cutter into different elevated positions relative to. said cutter head.

14. Ina mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical XlS, a support mounted on said turntable for adjust-- ment intodifferent elevated positions relative thereto, a cutter head mounted on the forward end of said support and overhanging said turntable, a kerf cutter mounted on said cutter head for adjustment into different elevated positions relative thereto, a motor mounted on said base independently of said turntable and said support, mechanism driven by said motor for actuating said kerf cutter, mechanism driven by said motor for adjusting said kerf cutter intodifferent elevated positions relative to said cutter head, and mechanism driven by said motor for adjusting said support relative to said turntable.

H 15. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a support mounted on said turntable for adjustment into difierent elevated positions relative thereto, a cutter head mounted on the forward end of said support and overhanging said turntable, a kerf cutter mounted on said cutter head for adjustment into different elevated positions relative thereto, a motor mounted on said base independently of said turntable and said support, mechanism driven by said motor for actuating said kerf cutter, mechanism driven by said motor for adjusting said kerf cutter into different elevated positions relative to said cutter head, mechanism driven bysaid motor -for adjusting said support relative to said turntable, and mechanism driven by said motor for rotating said turntable.

16. In a mining apparatus, a portable base, a horizontal turntable mounted onsaid base for rotation relative thereto about a vertical axis, a. support mounted on said turntable fol-adjustment into different elevated positions relative theret a cutter head mounted on the forward end of said support and overhangingv said turntable, keri' cuttermounted on said cutter head for adjustment into diiferent elevated positions relative thereto, a motor mounted on said. base independently of said-turntable and said support, mechanism driven'by said motor for. actuating said kerf cutter, mechanism driven by said motor for adjusting said kerf cutter, into different elevated positions relative to said cutter head, mechanism drivenby saidmotor for adjusting said support relative to' said turntable, mechanism driven by said motor for rotating said turntable, and mechanism driven by said motor for propelling the apparatus.

17. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto ab'outa' vertical axis, a support mounted on said turntable for adjustment into different elevated positions relative thereto, a cutter head mounted on the forward end of said support for rotation relative thereto about a horizontal axis and overhanging said turntable, a leer; cutter mounted .on said cutter head for adjustment toward and from the head axis, a motor mounted on said base independently of said turntable and said support, mechanism driven by said motor for actuating said kerf cutter, and mechanism driven by said motor for'rotating said cutter head about its axis;

18. In a mining apparatus, a portablexbase, a horizontal turntable mounted on said base for rotation reiative thereto about a vertical axis," a support mounted on said turntable for adjustment into dihferent elevated positions relative thereto, acutter head mounted on the forward end .of said support'for rotation relative thereto about a'horizontal axis and overhangingsaid turntable, a kerf cutter. mounted on-said cutter head for adjustment toward and from the head axis, a motor mounted on said base independently ofysaid turntable and said support, mechanism driven by said motor for actuating said kerr" cutter, mechanism driven by said mo-. tor for rotating said cutter head about its axis, and mechanism driven by said motor for ad--' justing said kerf'cutter toward and from the head axis.

19. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical ax'is, a support mounted on said turntable for adjustment into difierent elevated positions relative thereto, a cutter head mounted on the forward end of said support for rotation relative thereto about a'horizontal axis and overhanging said turntable, a kerf cutter mounted on said cutter head for adjustment toward and from the' head axis, a motormounted on said base independently of said turntable and said support,

mechanism driven by said motor for actuating said kerf cutter, mechanism driven by said rnotor for rotating said cutter head about its axis, mechanisnrdriven by said motor for adjusting lzerf'cutter toward and from the head axis, andinechanismdriven by said motor for adjusting said supportrelative to said turntable.

' so. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a port mounted on said turntable for adjustment 'into' different elevated positions relative thereto, cutter head mounted on the forward end of said support for rotation relative thereto about 21. In a mining apparatus, a portable horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a support mounted on said turntable for adjustment into different elevated positions relative there to, a cutter head mounted on the forward end of said support for rotation relative thereto about a horizontal axis and overhanging said turntable, a kerf cutter mounted on said cutter head for adjustment toward and from the head axis, a motor mounted on said base independently of said turntable and said support, mechanism driven by. said motor for actuating said kerf cutter, mechanism driven by said motorfo'r rotating said cutter h ad about its axis, mecha nism driven by said motor for adjusting said herf cutter toward and from the head axis, mechanism driven by said motor for adjusting said support relative to said turntable, mechanism driven by said motor for rotating said turntable,

mechanism driven by said motor for pro-' polling the apparatus. 7

22. In a mining apapratus, a wheel supported truck frame adapted to travel along a mine trackway, a horizontal turntable on said frame, a support mountedon said turntable for rotation therewith relative to said truck frame, said support overhanging the front end of the truck frame, depending guideways on the forward extremity of said overhanging support, a horizontal kerf cutter arranged on said guideways for adjustment therealong into different elevated positions, devices arranged beneath the turntable between the front truck wheels and the truck frame for tilting said truck frame about the axes of the rear wheels to change the angle in altitude of the kerf cutter, and a motor mounted on said tiltable truck frame and relative to which said turntable is rotatable for rotating said turntable, for actuating said kerf cutter and for adjusting said kerf cutter along said guideways.

'23. n: a mining apparatus, a wheel supported truck frame adapted to travel along a mine trackway, a horizontal turntable on said truck frame, a support mounted on said turntable for truck frame, a rotatable cutter head mounted on rotation therewith relative to said truck frame, said support overhanging the front end of the the forward overhanging extremity of said sup-'- port for rotation relative thereto abouta hori zontal axis, a kerf cutter pivotally mounted'on said cutter head and rotatable with said head about the head axis into horizontaland vertical cutting positions, devices arranged beneath the turntable between the front truck wheels and the truck frame for tilting the latter about the axes of the rear truck wheels to vary the angle in altitude of the head axis, and a motor mounted on said tiltable truck; frame and relative to which said turntable is rotatable for rotating said turntable, for rotating said cutter head and for actue ating the kerf cutter. Y Y

24. In a mining apparatus,a wheel supported truck frame adapted to travel along a mine trackway, a horizontal turntable on said frame,

a support mounted on said turntable forrotation therewith relative to said truck frame, said support overhanging the front end of the truck frame, depending guideways on the forward'extremity of said overhanging support, a'horizontal kerf cutter arranged on said guideways for adjustment therealong into different elevated positions, devices arranged beneath the turntable between the front truck wheels and the truck frame for tilting said truck frame about the axes or the rear wheels .to change theangle in altitude of the lrerf' cutter, and a motor mounted on said tiltable truck frame and relative to which's'aid turntable is rotatable for rotating said turntable; for actuating said kerf cutter, for adjusting said kerf cutter along said guideways and for driving the truck wheels to propel the apparatus.

25. In a mining apparatus, a wheel supported truck frame adapted to travel along a mine traclcway, a horizontal turntable on said truck frame, a support mounted on said turntable for rotation therewith relative to said truck frame,

said support overhanging the front end of the truck frame, a rotatable cutter head mounted horizontal axis, a kerf cutter pivotally mounted on said cutter head and rotatable with said head about the head axis into horizontal and vertical cutting positions, devices arranged beneath the turntable between the front truck'wheels and the truck frame for tilting the latter about the axes of the rear truck wheels to vary the angle in altitude of the head axis, and a motor mounted on said tiltable truck frame and relative to which said turntable is rotatable for rotatingsaid turntable, for rotating said cutter head, for actuating the kerf cutter and for driving the truck wheels to propel the apparatus.

l 26. In a mining'apparatus, a wheeled support adapted to runalong a mine trackway, a-frame pivotally mounted on said support for horizontal swinging movement relative thereto, said frame overlying said support and at its forward end overhanging said support, vertical guideways on the forward extremity of said swingable frame and extending downwardly in advance of said support, a frame mounted in said guideways for vertical adjustment therealong, a kerf cutter pivotally mounted on said adjustable frame, said swingabie frame and adjustable frame being adjustable to position said kerf cutter to out ahorizontal kerf at the level of the mine bottom outside and below the level of the mine trackway and in advance of the trackway, and a motor mounted on said wheeled support and relative to which said first mentioned frame is swingable for driving said kerf cutter.

frame overlying said support and at its forward end overhanging said support, vertical guideways on the forward extremity of said swingable frame and extending downwardly in advance of said support, a frame mounted in said 'guideways for vertical adjustment therealong, a kerf cutter pivotally mounted on said adjustable frame, said swingable frameand adjustable frame being adjustable to position said kerf cutter to cut a horizontal kerf at. the level of the mine bottom outside and below the level of the mine trackway and in advance of the trackway, and a motor mounted on said wheeled support and relative to which said first mentioned frame is swingable for driving said kerf cutter and for swinging said kerf cutter about its pivot.

28. In a mining apparatus, a wheeled support adapted to run along a mine trackway, a frame pivotally mounted on said support for horizontal swinging movement relative thereto, said frame overlying said support and at its forward end overhanging said support, vertical guideways on the forward extremity of said swingable frame and extending downwardly in advance of said support, a frame mounted in said guideways for vertical adjustment therealong, a kerf cutter pivotally mounted on said adjustable frame, said swingable frame and adjustable frame being adjustable to position said kerf cutter to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine trackway and in advance of the trackway, and a motor mounted on said wheeled support and relative to which said first mentioned frame is swingable for driving said kerf cutter, for swinging said first mentioned frame about its pivot and for swinging said kerf cutter about its pivot.

29. In a mining apparatus, a wheeled support adapted to run along a mine trackway, a frame pivotally mounted on said support for horizontal swinging movement relative thereto, said frame overlying said support and at its forward end overhanging said support, vertical guideways on the forward extremity of said swingable frame and extending downwardly in advance of said support, a frame mounted in said guideways for vertical adjustment therealong, a kerf cutter pivotally mounted on said adjustable frame, said swingable frame and adjustable frame being adjustable to position said kerf cutter to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine trackway and in advance of the trackway, and a motor mounted on said wheeled support and relative to which said first mentioned frame is swingable for driving said kerf cutter, for swinging said first mentioned frame about its pivot, for adjustingsaid second mentioned frame along its guideways and for swinging said kerf cutter about its pivot.

v 30. In a mining apparatus, a portable base, a frame structure mounted on and overlying said base and at its forward extremity overhanging said base, said frame structure being swingable from one side of said base to the other, depending guideways on said overhanging frame structure extending downwardly in advance of said base, a horizontal kerf cutter mounted on said guideways for adjustment into different parallel positions relative to said frame structure, said kerf cutter being adjustable into a position to cut a horizontal kerf at the level of the mine bottom outside the path of movement of said base and in advance of said base, a motor mounted on said base and relative to which said frame structure is swingable, and mechanism driven by said motor for swinging said frame structure relative to said base, for actuating said. kerf cutterv and for adjusting said kerf cutter into aforesaid parallel planes relative to said frame structure.

31. In a mining apparatus, a portable base, a' frame structure mounted on and overlying. said base and at its forward extremity overhanging said base, said frame structure being swingable from one side :of said base to the other, depending guideways on said overhanging frame structure extending downwardly in advance of said base, a horizontal kerf cutter mounted on said guideways for adjustment into different parallel positions relative to said frame structure, said kerf cutter being adjustable into a position to cut a horizontal kerf at the level of the mine bottom outside the path of movement of'said base and in advance of said base, a motor mounted on said base and relative to which said frame structure is swingable, mechanism driven by said motor for swinging said'frame structure relative to said base, for actuating said kerf cutter and for adjusting said kerf cutter into aforesaid parallel planes relative to said frame structure, and mechanism for adjusting said kerf cutter relative to said frame structure into; a vertical position to swing vertically to out a vertical kerf.

32. In a mining apparatus, a portable base,-

a frame structure mounted on and overlying said base and at its forward extremity overhanging said base, said frame structure being swingable from one side of said base to the other, depending guideways on said overhanging frame structure extending downwardly in advance of said base, a horizontal kerf cutter mounted on said guideways for adjustmentinto different parallel positions relative to said frame structure, said kerf cutter being adjustable into a position to cut a horizontal kerf at the level of the mine bottom outside the path of movement of said base and in advance of said base, a motor mounted on said base and relative to which said frame structure is swingable, mechanism driven by said motor for swinging said frame structure relative to said base, for actuating said kerf cutter and for adjusting said kerf cutter into aforesaid parallel planes relative to said frame structure, and mechanism driven by said motor for adjusting said kerf cutter into a vertical position to swing vertically to out a vertical kerf, 33. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative theretoabout a substantially vertical axis, a cutter head mounted on said turntable for rotation relative thereto about a horizontal axis, a'kerf cutter pivotally mounted on said cutter head, a motor mounted on said base at the rear of said turntable and relative to which said turntable is rotatable, and mechanism driven by said motor for rotating said turntable, for rotating said cutter head, for swinging said kerf cutter and for actuating said kerf cutter, said cutter head rotating and kerf cutter swinging and actuating mechanism including a drive shaft coaxial with the turntable, driving connections betweenthe motor and said shaft and driving connections between said shaft and said cutter head and kerf cutter.

34. In a mining apparatus, a portable base,

a horizontal turntable mounted on said base for rotation relative thereto about a substantially vertical axis, a cutter head mounted on said turntable I or rotation relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutter head, said kerf cutter being adjustable to cut a horizontal kerf at the level of the mine bottom outside the path of movement of said base and in advance of said base, a motormounted on said base at the rear of said turntable and relative to which said turntable is rotatable, and mechanismdriven by 'said motor for rotating said turntable, for rotating said cutter head, for swinging said kerf cutter and for actuating said kerf cutter, said cutt'er head rotating and kerf cutter swinging and actuating mechanism including a drive shaft coaxial with the turntable, driving connections between the motor and said shaft, and driving connections between said shaft and said cutter head and'kerf cutter.

, 35. In a mining apparatus, a portable base, a horizontal turntable mounted on said'base for rotation relative thereto about a substantially vertical axis, a cutter head mounted on said turn-,

, table for rotation relative thereto about a horizontal axis, guideways extending perpendicularly relative tothe head axis, .a support mounted on said guideways for adjustment toward and from the .head axis, a kerf cutter pivotally mounted on 7. said support, a motor mounted on said base at the rear of said turntable and relative to which said turntable is rotatable, and mechanism driven by said motor for rotating said turntable,'for adjusting said support toward and from the head axis, for rotating said cutter head, for swinging said kerf cutter and for actuating said kerf cutter, said support adjusting, head rotating and kerf cutter swinging and actuating mechanism including a drive shaft coaxial with the turntable, driving connections between the motor and said shaft and driving connections between said shaft and said support, cutter head and kerf cutter.

36. In a mining apparatus, a portable basega horizontal turntable mounted on said base :for rotation relative thereto about a substantially vertical axis, a cutter head mounted on said turntable for rotation relative thereto about a horizontal axis, guideways extendingv perpendicularly relative to the head axis, a support mounted on said guideways for adjustment toward and from the head axis, a kerf cutter pivotally mounted on said support, said kerf cutter being adjustable to cut a horizontal kerf at the level of the mine bottom outside the path of movement of said base and in advance of'said base, a

motor mounted on said base at the rear of said turntable and relative to which said turntable is rotatable, and mechanism driven by said motor for rotating said turntable, for adjusting said i truck frame-adapted to run along a mine trackway and mounted for universal tilting movement relative to the horizontal, a frame structure mounted on and overlying said'truck frame and at its forward extremity overhangingi'said truck frame, said frame structure being swingable horiz'ontally relative to said truck frame, depending vertical guideways carried bysaid-overhanging frame structure and extending downwardly in advance of said truck frame, a support mounted on said guideways for adjustment therealong" into different elevated positions, a kerf jcutter pivotally mounted on said support, saidsupport and frame structure being adjustable tof position said kerf cutter to cut a horizontal kerf at the level of the mine bottom outside. and below the level of the mine trackwayand in advance of the trackwayyand a motor mounted on -the rear end of saidtruck frame 'andvrelative to which said frame structure is swingable for drivingthe truck wheels to propel the apparatus, for swinging said frame structure, for adjusting said sup port and for actuating said kerf cutter. 1, t 38. In a mining apparatus, a wheel'mounted truck frame-adapted to run along a mine track;- way and mounted for universal tilting movement relative to the horizontal; a frame structure mounted on and overlying said truck frame and at its forward extremity overhanging said truck frame, said frame structure being swingable-horizontally relative to said truck frame, a cutter head mounted on the overhanging exteremity of.

said frame structure for rotation relative thereto about a horizontal axis extending radially with respect to the swivel axis of said frame structure, guideways on said cutter head: extending perpendicularly with respect to the head axis, a support mounted onsaid guidewaysfor adjustment therealong toward and from the head axis, a kerf cutter pivotallymounted on said support, said frame structure, cutter head and support being adjustable to position said kerf cutter to cut a horizontal kerf atthe level of the mine bottom outside and below the level of the mine trackway and in advance of the trackway and toflcut a vertical kerf, and a motor mounted on said base at the rear of said frame structure and relative to which said frame structure is swingable for driving the truck wheels to propel the apparatus, for swinging said frame, structure relative to said truck frame, for rotating said cutter head, for adjusting said support toward and from the head axis and for actuating said kerf cutter;

39. In a mining apparatus, a. wheel supported truck frame adapted to run along a mine trackway and mounted for tilting movement relative to the horizontal about transverse and longitudinal axes, devices between thetruck frame and truck wheels for tilting said truck frame about said transverse and longitudinal axes, a frame structure mounted on and overlying said truck frame and at its forward extremity overhanging said truck frame, said frame structure being swingable horizontally relative to said truck frame about a vertical axis located between the truck wheel axes,- depending vertical guideways car-e ried on the forward overhanging extremity of said frame structure and extending downwarde ly in advance of said truck-frame, a support mounted on said guideways for adjustment therealong into different elevated positions, a kerf cutter pivotally mounted on said support, said frame structure and-support being adjustable to position said kerf cutter to cut a horizontal kerf at the level of the mine bottom'outside and below thelevel of the mine trackway and in advance of the trackway, and a motor mounted on said truck frame at the rear of said frame structure along said guideways and for actuating said cutter.

40. In a mining apparatus, a wheel supported truck frame adapted to run along a mine trackway and mounted for tilting movement relative to the horizontal about transverse and longitudinal axes, devices between said truck frame and the truck wheels for tilting said truck frame about said transverse and longitudinal axes, a frame structure mounted on and overlying said truck frame and at its forward extremity overhanging said truck frame, said frame structure being swingable horizontally about a vertical axis relative to the truck frame, a cutter head rotatably mounted on said frame structure for rotation relkerf ative thereto about an axis extending radiallywith respect to the swivel axis of said frame structure, guideways carried by said cutter head and extending perpendicularly with respect to the head axis, a support mounted on said guideways for adjustment therealong toward and from the head axis, a kerf cutter pivotally mounted on said support, said frame structure, cutter head and support being adjustable to position said kerf cutter to cut a horizontal kerf at the level of the mine bottom outside and below the level of the mine trackway and in advance of the trackway and to cut a vertical kerf, and a motor mounted on said truck frame at the rear of said frame structure for driving the support wheels to propel the apparatus, for swinging said frame structure relative to said truck frame for rotating said cutter head, for moving said support toward and from the head axis, and for actuating said kerf cutter.

41. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a substantially vertical axis, a support mounted on said turntable for adjustment in a vertical direction relative thereto, vertical depending guideways carried by said support and extending downwardly in advance of said base, a support mounted on said guideways for adjustment therealong into different elevated positions, a kerf cutter pivotally mounted on said latter support, and a motor mounted on said base at the rear of said turntable and relative to which said turntable is rotatable, and mechanism driven by said motor for rotating said turntable, for adjusting said first support relative to said turntable, for adjusting said second support along said guideways and for actuating said kerf cutter, said support adjusting and kerf cutter actuating mechanism including a telescopic torque shaft coaxial with the turntable, driving connections between the motor and said shaft, and driving connections between said shaft and said supports and kerf cutter.

42. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a substantially vertical axis, a support mounted on said turntable for adjustment in a vertical direction relative thereto, vertical depending guidewayscarried by said support and extending downwardly in advance of said base, a support mounted on said guideways for adjustment therealong into and kerf cutter.

different elevated positions, a kerf cutter pivotal- 1y mounted on said latter support,-said kerf I cutter being'adjustable to cut a horizontal kerf ter, said support adjusting and kerf cutter actuating mechanism including a telescopic torque shaft coaxial with the turntable, driving connections between the motor and said shaft, and driving connections between said shaft and said supv ports and kerf cutter.

43. In a mining apparatus, a portable base, a

horizontal turntable mounted on said base for rotation relative thereto about a substantially vertical axis, a support mounted on said'turntable for vertical adjustment relative thereto, a cutter head mounted on said support for rotation relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutterhead, a motor mounted on said base at the rear ofsaid turntable and relative to which said turntable is rotatable, and mechanism driven by said motor for rotating said turntable, for adjusting said support relative to'said turntable, for rotating said cutter head and for actuating said kerf cutter, said support adjusting, cutter head rotating and kerf cutter actuating mechanism including a telescopic torque shaft coaxial with the turntable, driving connections between the motorand said shaft, and driving connections between said shaft and said support, cutter head and kerf cutterQ i 44. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a substantially vertical axis, a support mounted on said turntable for vertical adjustment relative thereto, a cutter head mounted on said support for rotation relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutter head, said turntable support and cutter head being adjustable to position said kerf cutter to cut a horizontal kerf at the level of the mine bottom outside the path of movement of said base and in advance of said base and to cut a vertical kerf, a motor on said base'at the rear of said turntable and relative to which said turntable is rotatable, and mechanism driven by said motor for rotating said turntable, for adjusting said support relative to said turntable, forrotating said cutter head and for actuating said kerf cutter, said support adjusting, cutter head rotating and kerf cutter actuating mechanism including a telescopic torque shaft coaxial with the turntable, driving connections between the motor and said shaft, and drivin'gconnections between said shaft and saidsupport, cutter head 

